Worksheets2024 Chapter 7/8 Test Review
Total questions: 45
Worksheet time: 23mins
Name
Class
Date
1.
When you bring the south ends of two magnets close together, they repel each other.
a)
True
b)
False
2.
The strength of an electromagnet can be increased by reducing the number of turns on the wire coil.
a)
True
b)
False
3.
An electric motor is used to change mechanical energy into electrical energy.
a)
True
b)
False
4.
Moving a wire through a magnetic field creates an electrical current in the wire.
a)
True
b)
False
5.
Before alternating current from a power plant can enter a home, its voltage must be boosted or increased
a)
True
b)
False
6.
Paper clips and other objects that contain iron can become permanent magnets.
a)
True
b)
False
7.
A magnetic field exists around any current carrying wire.
a)
True
b)
False
8.
A coil of wire carrying a current has a magnetic field.
a)
True
b)
False
9.
A device that increases or decreases voltage in a power line is a ____.
a)
commutator
b)
generator
c)
motor
d)
transformer
10.
Current that does NOT reverse direction is called ____.
a)
alternating current
b)
circuit current
c)
direct current
d)
magnetic current
11.
A battery is an example of _______________.
a)
alternating current
b)
water current
c)
direct current
d)
magnetic current
12.
A wall socket is an example of ____________.
a)
alternating current
b)
water current
c)
direct current
d)
magnetic current
13.
Current that reverses direction in a regular pattern is called _________________.
a)
alternating current
b)
water current
c)
direct current
d)
magnetic current
14.
The location of the strongest magnetic forces is the ____.
a)
electromagnets
b)
magnetic domains
c)
magnetic fields
d)
magnetic poles
15.
The region around a magnet where the magnetic forces act is the ____.
a)
electromagnetic pole
b)
magnetic domain
c)
magnetic field
d)
magnetic pole
16.
A device that uses an electromagnet to measure electric current is a(n) ____.
a)
galvanometer
b)
commutator
c)
electric motor
d)
generator
17.
A simple transformer consists of two coils of wire called the ____.
a)
input and output loops
b)
step-up and step-down generators
c)
alternating and direct currents
d)
primary and secondary coils
18.
The function of an electric motor is to change ____.
a)
chemical energy to electrical energy
b)
electrical energy to chemical energy
c)
electrical energy to mechanical energy
d)
mechanical energy to electrical energy
19.
The function of a generator is to change ____.
a)
chemical energy to electrical energy
b)
electrical energy to chemical energy
c)
electrical energy to mechanical energy
d)
mechanical energy to electrical energy
20.
The domains in a magnet are ____.
a)
arranged randomly
b)
aligned according to magnetic fields
c)
negatively charged
d)
positively charged
21.
Some gauges on the dashboard of a car are ____.
a)
galvanometers
b)
step-up transformers
c)
step-down transformers
d)
generators
22.
A transformer that increases voltage is a ____.
a)
resistance transformer
b)
step-down transformer
c)
step-up transformer
d)
voltage motor
23.
The south pole of a magnet ____.
a)
attracts another south pole
b)
repels a paper clip
c)
attracts a north pole
d)
repels a north pole
24.
When you break an iron magnet into two pieces, you get ____.
a)
two north poles
b)
two south poles
c)
two north poles and two south poles
d)
a piece of iron that is no longer magnetic
25.
The location of the strongest magnetic field is the ____.
a)
center of the magnet
b)
magnetic fields
c)
magnetic domains
d)
magnetic poles
26.
An electromagnet is ____.
a)
a permanent magnet
b)
made with bar magnets
c)
attracts all metal substances
d)
only operating when the current is on
27.
Petroleum, natural gas, and coal are the three kinds of ____.
a)
fossil fuels
b)
nuclear fuels
c)
nuclear waste
d)
synthetic fuels
28.
Electricity produced by falling water is called ____.
a)
geothermal energy
b)
thermodynamics
c)
hydroelectricity
d)
tidal energy
29.
Electric current is produced when a spinning ____ shaft rotates magnets inside a generator.
a)
combustion
b)
steam
c)
turbine
d)
boiler
30.
One reason alternative energy sources are needed is because ____.
a)
the energy needs of the world are decreasing
b)
there is no limit to the supply of fossil fuels
c)
the population of the world is decreasing
d)
the supply of fossil fuel is diminishing
31.
Which of the following is an example of a nonrenewable source of energy?
a)
coal
b)
the Sun
c)
water
d)
wind
32.
The following picture is an example of a...
a)
generator
b)
motor
c)
transformer
d)
galvanometer
33.
The following picture is an example of a...
a)
generator
b)
motor
c)
transformer
d)
galvanometer
34.
The following picture is an example of a...
a)
generator
b)
motor
c)
transformer
d)
galvanometer
35.
When would you use a step-up transformer?
a)
To increase voltage from a power plant
b)
To decrease voltage from a power plant
c)
To increase voltage for your house
d)
To decrease voltage for your house
36.
When would you use a step-down transformer?
a)
To increase voltage from a power plant
b)
To decrease voltage from a power plant
c)
To increase voltage for your house
d)
To decrease voltage for your house
37.
A(n) ______________ resource is one that is replaced as quickly as it is used.
a)
renewable
b)
natural
c)
nonrenewable
d)
unnatural
38.
Renewable organic matter, such as wood and rice hulls, are examples of _____________.
a)
fossil fuels
b)
nuclear fuels
c)
fission products
d)
biomass
39.
______________ is the process of producing a current by moving a loop of wire through through a magnetic field.
a)
Generation
b)
Electromagnetic induction
c)
Electromagnetic deduction
d)
Magnetic charging
40.
Geothermal power plants get their thermal energy from which of these?
a)
Earthquakes
b)
Volcanoes
c)
Magma
d)
Lava Girl
41.
Electricity produced by falling water is called _________.
a)
geothermal energy
b)
thermodynamics
c)
hydroelectricity
d)
tidal energy
42.
Which of the following is an example of a nonrenewable source of energy?
a)
coal
b)
the Sun
c)
water
d)
wind
43.
Which is not part of a generator?
a)
wire coil
b)
magnet
c)
turbine
d)
battery
44.
Which type of energy source is shown in the picture?
a)
Hydroelectric
b)
Nuclear
c)
Natural Gas
d)
Solar
45.
Which type of energy source is pictured?
a)
Hydroelectric
b)
TurboPower
c)
Wind
d)
Nuclear
100 %
